Holley EFI Billet Aluminum Intake Manifold Adapter Plates

2002–2008 Chrysler 300 / Dodge Ram 1500 / Ram 2500 / Ram 3500 / Charger / Durango / Magnum / Jeep Grand Cherokee 5.7L Gen III Hemi

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Overview:

The Holley EFI Billet Aluminum Intake Manifold Adapter Plates are engineered to bridge the gap between early 5.7L Gen III Hemi engines and larger port intake manifolds. Specifically designed for 2002 to 2008 Chrysler and Dodge vehicles equipped with the early generation small intake port Hemi engines, these adapter plates enable the installation of Gen III Hemi Hi-Ram intake manifolds that originally fit only larger port engines. This upgrade allows enthusiasts and performance builders to unlock enhanced airflow potential without the need for costly cylinder head modifications.

Ideal for owners of Chrysler 300, Dodge Ram 1500, 2500, 3500, Charger, Durango, Magnum, and Jeep Grand Cherokee models from the early to mid-2000s, these adapter plates provide a seamless and reliable solution to improve intake manifold compatibility and performance.

Key Features:

Designed with precision and durability in mind, the Holley EFI adapter plates offer the following benefits:

• Enables use of Gen III Hemi Hi-Ram intake manifolds on early small intake port 5.7L Hemi engines
• Manufactured from high-quality billet aluminum for strength and lightweight performance
• Includes all necessary hardware and gaskets for straightforward installation
• Precisely machined 0.945" thickness to maintain proper manifold alignment and sealing
• Compatible with a wide range of Chrysler and Dodge vehicles from 2002 to 2008
• Improves airflow potential by adapting larger port manifolds to early engines
• Corrosion-resistant finish ensures long-lasting durability under engine bay conditions

Construction & Design:

Holley EFI’s adapter plates are crafted from billet aluminum, chosen for its excellent strength-to-weight ratio and resistance to heat and corrosion. The plates are CNC-machined to exacting tolerances, ensuring a perfect fit between the intake manifold and the cylinder heads. The 0.945-inch thickness is engineered to maintain optimal intake manifold positioning, preventing leaks and ensuring consistent airflow. The billet construction also contributes to improved thermal stability compared to cast or stamped alternatives.

Installation & Fitment:

Installation of the Holley EFI intake manifold adapter plates is straightforward and designed to fit directly onto early 5.7L Gen III Hemi engines without the need for modifications to the cylinder heads or intake manifold. The included hardware and gaskets simplify the process, allowing for a secure and leak-free seal. These adapter plates are compatible with the following vehicles equipped with the 5.7L Gen III Hemi engine:

• Chrysler 300 (2005–2008)
• Dodge Ram 1500 (2003–2008)
• Dodge Ram 2500 (2003–2008)
• Dodge Ram 3500 (2002–2008)
• Dodge Charger (2006–2008)
• Dodge Durango (2004–2008)
• Dodge Magnum (2005–2008)
• Jeep Grand Cherokee (2005–2008)

What's Included:

• Billet aluminum intake manifold adapter plates
• Complete set of mounting hardware
• High-quality intake manifold gaskets

Ideal For:

This product is perfect for automotive enthusiasts, performance tuners, and engine builders looking to upgrade early 5.7L Gen III Hemi engines with larger port intake manifolds. Whether restoring, modifying, or enhancing your Chrysler or Dodge vehicle’s engine, these adapter plates provide a cost-effective and reliable solution to improve airflow and support higher performance setups without extensive engine modifications.

Holley EFI delivers standalone engine management and EFI systems built for everything from engine swaps to serious horsepower builds. With platforms like Sniper, Terminator X, HP, and Dominator, Holley EFI is aimed at enthusiasts who want modern tuning control, data, and drivability—whether it’s a street car, track car, or full-on race program.